Information Database - Combustibility

Every gas has a certain grade of combustibility. The combustibility determines how the gas will react with open flames and how efficient it is as a fuel in a Gas Furnace or Gas Lantern.

NameFuel efficiencyOpen flame interaction
Flammable2Becomes Ignited Gas and spreads
Highly flammable3Becomes Ignited Gas and spreads quickly
Explosive4Creates an explosion with power depending on gas volume
Highly explosive5Creates a powerful explosion with power depending on gas volume

The fuel efficiency determines for how long a volume of gas can last as a fuel, or if it even counts as a fuel at all. For instance, a highly explosive gas can keep a furnace running for 5 times as long as a controllable gas, while a non-combustible gas will not work as fuel.